The specific heat of iron titanium hydride at room temperature

Specific heat measurements were used to determine vibrational properties of hydrogen interstitials in the intermetallic alloy Fe_{0, 49}Mn_{0, 01}Ti_{0, 5}H_x. The specific heats are 0, 465 J/gK for x = 0, 0, 486 for x = 0, 31, 0, 515 for x = 0, 47, 0, 557 for x = 0, 66 at 280 K. The localized vibrational excitations of hydrogen have an energy of 100 meV for x = 0, 5 and 77 meV for x = 1. The Debye temperature at x = 0 is 300 K at a temperature of 280 K.